0:00
All right.
00:04
So let's begin.
00:06
We've got this sort of alcohol, alken, sort of thing.
00:15
Okay.
00:17
So first thing is first is assigning priority to all the functional groups on the chiral carbon.
00:23
Alcohol is going to be the highest, it's the highest atomic number.
00:26
Then we're comparing carbon to carbon.
00:28
These are both ch2, so they're the same.
00:31
Here's a ch2 and a ch.
00:34
Right? see, this is connected to carbon, carbon, and hydrogen.
00:38
Ch.
00:38
This is carbon, hydrogen, hydrogen.
00:40
That's ch2.
00:42
So the one on the right is going to win out, right? because being connected to carbon is more important than hydrogen.
00:48
This is connected to more carbons.
00:49
The one on the left is connected to more hydrogens.
00:52
So this ultimately means that this is priority two and this is priority three.
00:59
And lowest priority is in the back.
01:01
Once we've assigned priority, what we do is we connect the most to the second most to the least most priority.
01:09
And determine if that connection goes clockwise or counterclockwise.
01:12
So i go one, two, three, and that is counterclockwise.
01:18
And then, depending on whether the highest priority substitute is in the back of the front, this case it's in the back.
01:24
We end up with s or r.
01:25
So when the lowest priority substitute is in the back, counterclockwise corresponds to s.
01:31
So this first one is s.
01:37
Let's continue.
01:50
Okay.
01:50
First thing is assigning.
01:52
Priority.
01:53
Nitrogen is higher priority than any carbons.
01:56
Then we're comparing ch3 to ch2.
01:58
Ch2 is higher priority...